Knowledge of the types and impacts of contaminants occurring in the freshwater wetlands of the Great Barrier Reef catchment area (GBRCA) is limited. The present study examined the presence and concentrations of pesticides occurring in 22 floodplain wetlands, situated in moderate to high‐intensity land uses in the GBRCA. The dominant land use within 1 km of the wetlands was sugar cane for 12 wetlands, grazing for 6 wetlands, plantation forestry and conservation for 2 wetlands, and one with an equal mix of land uses. Fifty‐nine pesticides and pesticide degradates were detected in the wetlands during 2 consecutive early wet seasons. These included 27 herbicides, 11 herbicide degradates, 11 insecticides, 8 fungicides, 1 nematicide, and 1 pesticide synergist. Each wetland sampled contained between 12 and 30 pesticides with an average of 21 pesticides detected per wetland sampling. Temporal differences existed in the number, types, and average concentrations of pesticides detected. No exceedances of Australian and New Zealand water guideline values were found during the first sampling season, while 10 wetlands had concentrations of at least 1 pesticide exceeding the guidelines during the following sampling season. For 1 wetland, concentrations of 4 pesticides were greater than the prescribed guideline values. Individually, the vast majority of aquatic species would be protected, but in some wetlands, diuron would affect 49% of species and atrazine up to 24% of species. Statistically significant correlations between the number of pesticides and the percentage of intensive land use, primarily sugar cane growing in a 1 km radius of the wetlands, were found. Integr Environ Assess Manag 2020;16:968–982. © 2020 SETAC

中文翻译：

---

大堡礁集水区湿地的普遍农药污染。

对大堡礁集水区（GBRCA）的淡水湿地中污染物的类型和影响的了解是有限的。本研究调查了GBRCA中中等强度到高强度土地利用的22个洪泛区湿地中农药的存在和浓度。距离湿地1公里以内的主要土地利用是12个湿地的甘蔗，6个湿地的放牧，2个湿地的人工林和养护，以及其中一个土地使用量均等的土地。在连续两个早期的湿季中，在湿地中检测到59种农药和农药降解物。其中包括27种除草剂，11种除草剂降解物，11种杀虫剂，8种杀真菌剂，1种杀线虫剂和1种农药增效剂。每个采样的湿地包含12至30种农药，每个采样平均检测21种农药。检测到的农药的数量，类型和平均浓度存在时间差异。在第一个采样季节没有发现超过澳大利亚和新西兰的水指标值，而在接下来的采样季节中有10个湿地的至少一种农药的浓度超过了该指标。对于1个湿地，4种农药的浓度高于规定的准则值。单独地，绝大多数水生物种将受到保护，但在某些湿地中，敌草隆会影响49％的物种，and去津会影响高达24％的物种。农药数量与土地集约利用百分比之间的统计显着相关性，Integr环境评估管理2020； 16：968–982。©2020 SETAC